Adjustable miter-gage.



J. M BLEY. ADJUSTABLE MITER GAGE. APPLIOATION FILED JA N.13, 1911. RENEWED DBO. 19, 1911.

1,034,068, Patented July 30, 1912.

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COLUMBIA PLANDCIRAPl l (IO-,WASHINOTON, n. c.

UNITED STATES Parana? OFFICE.

JQHN M. BLEY, oernrnannnrnrn, PENNSYLVANIA.

ADJUSTABLE MITER-GAGE.

Specification of Letters Patent. P t t d Ju1y30, 2 Application filed January 13, 1911, Serial No. 602,412.

Renewed December 19, 1911. Serial No. 666,837.

To all whom it may concern.-

Be it known that I, JOHN M. BLEY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Adjustable Miter-Gage, of which the following is a specification.

The principal object of the present invention is to provide a miter gage which shall be practically efficient for the purposes intended and conveniently adjustable for use in cutting various angles as required in different classes of work and which can be manufactured economically.

The invention consists in the novel construction and arrangement of parts, whereby the above results are obtained as will be hereinafter fully described reference being had to the accompanying drawings in which:

Figure 1, is a plan View of the adjustable miter gage of the invention, illustrating the tool guide in a position for effecting a cut at an acute angle, Fig. 2, is a view in side elevation thereof, Fig. 3, is a top or plan view illustrating the parts in folded position both in full and dotted lines, Fig. 4, is a fragmentary view drawn to an enlarged scale illustrating the parts of the miter gage in position for procuring a cut at a right angle, Fig. 5, is an edge view thereof, and Fig. 6, is a fragmentary view in section taken on the line 6-6 of Fig. 4.

Referring to the parts of the drawing there is illustrated what may be termed a base plate 1, of elongated rectangular configuration and having preferably formed integral therewith a depending or overhanging flange 2, for engaging work to be operated upon. As shown in Fig. 2, the flange 2, is perforated, as at 3, in order that the base plate may be, if desired, temporarily secured, as by screws or the like, to the work being operated upon to prevent slipping of the parts. The base plate 1, terminates at one end in a rounded portion 4. Pivotally mounted with respect to said rounded portion 4,of the plate 1, and surmounting the same, is a second plate 5, also of elongated rectangular configuration but slightly longer than the plate 1, the pivot point being designated 6. This plate 5, is provided intermediate its two ends with a semi-circular portion 7, so as to conformwith the rounded end 4, of the base plate 1, and form convenient means for the pivot point. The plate 5, which may be termed a tool guide is further provided with a vertically disposed upwardly extending flange 8, serving as a guide for a saw or other tool. Shown as surmounting the semi-circular portion 7, of the plate 5, and riveted thereto as M11, is a substantially circular disk 12, circumferentially notched as at 13, said notches corresponding with the proper positions of adjustment at which the miter gage is set for use, the said notches being designated by the various degrees of said positions. An indicator 14, is present for designating the various positions of adjustment of the miter gage parts. The indicator 14, is shown as having fixed relation, as by means of a screw 15, with the pivot stud 6. Shown as being carried by the base plate 1, is a pivotally arranged detent 17, adapted to normally engage one of the notches 13, of the disk 12, for locking in adjusted position the plates 1, and 5, a spring 18, being present for pressing against the said detent 17, for retaining the same in proper position, see Figs. 1, to 5, inclusive. When it is desired to move the plate 5, around its pivotal point 6, in order to obtain various angles, the detent 17, is shifted free of the notches 13, see Fig. 6. hen the detent 17, is in this position the plate 5, is free to be moved in various directions. In this connection, it may be remarked that the plate 5, may be shifted first, to a position at right angles to the base plate, see Fig. 4; second, at various angleswith respect to the plate 1, see Fig. 1; third, into a position parallel with the base plate 1, see full lines in Fig. 3, and fourth, the'plate 5, may be swung around its pivotal point in an opposite direction or that shown by dotted lines in Fig. 3. When the plates 1, and 5, are arranged in parallelism as above described a convenient form is supplied in which to pack the parts for delivery or storage.

What I claim is:

1. In a miter gage the combination of a relatively wide base plate having a depending fiange said plate being of the same thickness throughout its length, a relatively narrow tool guide provided with an upwardly extending flange surmounting the base plate and having pivotal relation therewith, a circumferentially notched member having fixed relation with the tool guide said notches being designated by numerals denoting degrees, and a spring controlled shiftable detent carried by the base plate cooperating With said notched member for interlocking the base plate and tool guide.

2. In a miter gage the combination of a relatively Wide base plate having a depending and perforated flange said plate being of the same thickness throughout its length, a relatively narrow tool guide having intermediate its ends a semi-circular extension and further provided throughout its length With an upwardly extending flange said tool guide surmounting the base plate and having pivotal relation therewith, a circumferentially notched disk-like member fitted Copies of this patent may be obtained for upon the semi-circular extension of the tool guide and secured thereto the notches of said disk being designated by numerals denoting degrees and a spring controlled shiftablo detent carried by the base plate for cooperating with the notched disk for interlocking the base plate and tool guide.

In testimony whereof, I have hereunto signed my name.

JOHN M. BLEY.

Witnesses:

AGNES E. CASKEY, GRANT C. OSBORNE.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

